Cell Reynolds Number

Inspect advection-vs-viscosity balance at grid scale to judge discretization risk.

visual calculatorNumerics & Stability

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

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cell Reynoldsdiscretizationboundedness

formula

KaTeX rendered

\begin{aligned}\text{Re\_cell = rho U dx / mu}\end{aligned}

ASCII source

Re_cell = rho U dx / mu

rho (kg/m^3)U (m/s)dx (m)mu (Pa·s)

Re_cell

8506.9444

discretization note

advection dominates cell scale

This is a practical mesh-scale signal. Large cell Reynolds number often pushes you toward upwinding, flux limiting, or a finer grid.

cell Reynolds discretization boundedness